10. Suppose there are 1000 sellers of used cars. Some sellers have high-quality cars and some sellers have low-quality cars. Buyers cannot tell the quality of each individual car, but know the proportion of cars that are high quality, represented by q. a. Briefly explain why the situation described above is a problem. (6 points) b. How is the proportion of high quality cars important? How does the proportion of high quality cars affect the market? (6 points)